#ifndef GIFTSENDERPROXY_H__
#define GIFTSENDERPROXY_H__

//include header
#include <covariant>
#include "GiftSender.h"

//using namespace
using namespace std;


namespace npProxy
{
    //class forward declaration
    
    class GiftSenderProxy ://  public BaseClass
        public covariant
    {
        //friend
        
        //embedded type
        public: enum class ErrorEnum
            {
                NoGiftSenderToProxyException = 1
            };
        
        //class skeleton
        public: GiftSenderProxy();
        public: GiftSenderProxy(const GiftSenderProxy& cpy);
        public: GiftSenderProxy(GiftSenderProxy&& mov) noexcept;
        public: virtual ~GiftSenderProxy();
        public: GiftSenderProxy& operator=(const GiftSenderProxy& asn);
        public: GiftSenderProxy& operator=(GiftSenderProxy&& mva) noexcept;
        public: virtual shared_ptr<covariant> clone() const throw();
        public: virtual shared_ptr<covariant> steal(void* sft=nullptr) throw();

        //other constructors
        public: explicit GiftSenderProxy(weak_ptr<GiftSender> giftSender);
        
        //public methods
        public: void sendDolls() throw(GiftSender::ErrorEnum, ErrorEnum);
        public: void sendFollows() throw(GiftSender::ErrorEnum, ErrorEnum);
        public: void sendChocolates() throw(GiftSender::ErrorEnum, ErrorEnum);
        
        //protected methods
        
        //private methods
        
        //protected data
        /* 类中不应该存在protected 访问级别的data
         * 要么私有，要么私有而后给出protected 访问级别的methods !!! */
        
        //private data
        /* 类中不应存在指针类型成员，
         * 取而代之，应使用智能指针予以包裹
         * 使用shared_ptr表示类拥有指针指向对象
         * 使用weak_ptr表示类仅可以使用指针指向对象
         * 智能指针对指针成员的封装和使用准则：
         * 1.类对象不允许使用unique_ptr包裹
         * 2.推敲业务逻辑，如果是共享的(share_ptr)，则尽可能少的共享指针对象
         * 3.如果从业务逻辑中发现类仅仅使用某个指针所指对象，则务必使用weak_ptr包裹指针，
         *   以此切实地描述这种使用而不拥有的关系
         * 4.类成员weak_ptr<*> ths，由其产生的，包裹this指针的，shared_ptr只允许在局部使用 */
        private: weak_ptr<GiftSender> giftSender;

        //static part
        
        //others
    };

    //inline functions
    inline GiftSenderProxy::GiftSenderProxy() // : BaseClass()
    {
        this->giftSender = weak_ptr<GiftSender>();
    }
    
    inline GiftSenderProxy::GiftSenderProxy(const GiftSenderProxy& cpy) // : BaseClass(cpy)
    {
        this->giftSender = cpy.giftSender;
    }
    
    inline GiftSenderProxy::GiftSenderProxy(GiftSenderProxy&& mov) noexcept // : BaseClass(move(mov))
    {
        this->giftSender = move(mov.giftSender);
    }
    
    inline GiftSenderProxy::~GiftSenderProxy()
    {
        
    }
    
    inline GiftSenderProxy& GiftSenderProxy::operator=(const GiftSenderProxy& asn)
    {
        if (this == &asn)
        {
            return *this;
        }
        else
        {
            // BaseClass::operator=(asn);
            
            //To do
            this->giftSender = asn.giftSender;
            
            return *this;
        }
    }
    
    inline GiftSenderProxy& GiftSenderProxy::operator=(GiftSenderProxy&& mva) noexcept
    {
        if (this == &mva)
        {
            return *this;
        }
        else
        {
            // BaseClass::operator=(move(mva));
            
            //To do
            this->giftSender = move(mva.giftSender);
            
            return *this;
        }
    }
    
    inline shared_ptr<covariant> GiftSenderProxy::clone() const throw()
    {
        //new an instance if not abstract.
        return shared_ptr<GiftSenderProxy>(new GiftSenderProxy(*this));
    }
    
    inline shared_ptr<covariant> GiftSenderProxy::steal(void* sft) throw()
    {
        GiftSenderProxy* shf = static_cast<GiftSenderProxy*>(sft);
        if (this == shf)
        {
            return shared_ptr<covariant>();
        }
        else
        {
            shared_ptr<GiftSenderProxy> ret;
            if (!shf)
            {
                //new an instance if not abstract.
                ret = shared_ptr<GiftSenderProxy>(new GiftSenderProxy(*this));
                shf = ret.get();
            }
            
            // BaseClass::steal(shf);
            
            //To do
            shf->giftSender = move(this->giftSender);
            
            return ret;
        }
    }
} // namespace npProxy


#endif //GIFTSENDERPROXY_H__
